TVLine has exclusively learned that Parker will appear in several Season 6 episodes of the Showtime drama as Lisa Marshall, the sister of Colin Hanks’ mysterious new character, Travis. Sounds innocent enough, but details surrounding Parker’s role are scarce — which piques our interest even more.

As we first reported, Hanks will appear in all 12 episodes of Dexter‘s sixth season as a brilliant expert on ancient artifacts who somehow becomes linked to a series of grisly murders in Miami. It remains unclear if Travis will turn out to be a friend or foe of a certain Dark Passenger. Either way, as Showtime president David Nevins recently told TVLine, this year’s installment “ is not [about] one big bad.”

Hit the comments with your own Dexter theories about the Marshall Family.